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Usage
Information
To enable OSPF on an interface, the network area command must include, in its range of addresses,
the primary IP address of an interface.
NOTE: An interface can be attached only to a single OSPF area.
If you delete all the network area commands for Area 0, the show ip ospf command output does not
list Area 0.
passive-interface
Suppress both receiving and sending routing updates on an interface.
Syntax
passive-interface {default | interface}
To enable both the receiving and sending routing, use the no passive-interface interface
command.
To return all OSPF interfaces (current and future) to active, use the no passive-interface
default command.
Parameters
default Enter the keyword default to make all OSPF interfaces (current and future)
passive.
interface Enter the following keywords and slot/port or number information:
● For Port Channel groups, enter the keywords port-channel then a number.
The range is from 1 to 128.
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
● For a VLAN, enter the keyword vlan then a number from 1 to 4094.
Command Modes ROUTER OSPF
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.19.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
Although the passive interface does not send or receive routing updates, the network on that interface is
still included in OSPF updates sent using other interfaces.
The default keyword sets all interfaces as passive. You can then configure individual interfaces, where
adjacencies are desired, using the no passive-interface interface command. The no form
of this command is inserted into the configuration for individual interfaces when the no passive-
interface interface command is issued while passive-interface default is configured.
This command behavior has changed as follows:
passive-interface interface
● The previous no passive-interface interface is removed from the running configuration.
● The ABR status for the router is updated.
● Save passive-interface interface into the running configuration.
passive-interface default
● All present and future OSPF interfaces are marked as passive.
● Any adjacency is explicitly terminated from all OSPF interfaces.
● All previous passive-interface interface commands are removed from the running
configuration.
● All previous no passive-interface interface commands are removed from the running
configuration.
no passive-interface interface
Open Shortest Path First (OSPFv2 and OSPFv3) 831